//
//  ModifyPhoneVC.m
//  MyProject
//
//  Created by jiaming yan on 2018/3/14.
//  Copyright © 2018年 yanjiaming. All rights reserved.
//

#import "ModifyPhoneVC.h"
#import "ModifySucessVC.h"

@interface ModifyPhoneVC ()
/** 定时器(这里不用带*，因为dispatch_source_t就是个类，内部已经包含了*) */
@property (nonatomic, strong) dispatch_source_t timer;
@property (weak, nonatomic) IBOutlet UIButton *codeButton;
@end

@implementation ModifyPhoneVC

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view from its nib.
    self.navigationItem.title = @"修改手机号";
}
- (IBAction)codeButtonClick:(UIButton *)sender {
    sender.enabled = NO;
   __block int count = 0;
    __weak typeof(self) weakSelf = self;
    // 获得队列
    dispatch_queue_t queue = dispatch_get_main_queue();
    
    // 创建一个定时器(dispatch_source_t本质还是个OC对象)
    self.timer = dispatch_source_create(DISPATCH_SOURCE_TYPE_TIMER, 0, 0, queue);
    
    // 设置定时器的各种属性（几时开始任务，每隔多长时间执行一次）
    // GCD的时间参数，一般是纳秒（1秒 == 10的9次方纳秒）
    // 何时开始执行第一个任务
    // dispatch_time(DISPATCH_TIME_NOW, 1.0 * NSEC_PER_SEC) 比当前时间晚3秒
    dispatch_time_t start = dispatch_time(DISPATCH_TIME_NOW, (int64_t)(1.0 * NSEC_PER_SEC));
    uint64_t interval = (uint64_t)(1.0 * NSEC_PER_SEC);
    dispatch_source_set_timer(self.timer, start, interval, 0);
    
    // 设置回调
    dispatch_source_set_event_handler(self.timer, ^{
        NSLog(@"------------%@", [NSThread currentThread]);
        count++;
        [weakSelf.codeButton setTitle:[NSString stringWithFormat:@"%zdS",60-count] forState:UIControlStateNormal];
        if (count == 60) {
            sender.enabled = YES;
            // 取消定时器
            dispatch_cancel(weakSelf.timer);
            weakSelf.timer = nil;
            [weakSelf.codeButton setTitle:[NSString stringWithFormat:@"获取验证码"] forState:UIControlStateNormal];
        }
        
    });
    
    // 启动定时器
    dispatch_resume(self.timer);
    
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}
- (IBAction)submitClick:(id)sender {
    ModifySucessVC *vc = [[ModifySucessVC alloc]init];
    vc.hidesBottomBarWhenPushed = YES;
    [self.navigationController pushViewController:vc animated:YES];
    
}

/*
#pragma mark - Navigation

// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    // Get the new view controller using [segue destinationViewController].
    // Pass the selected object to the new view controller.
}
*/

@end
